Amazing Optical Phenomenon in Alabama Yesterday | Weather
Yesterday in Alabama a "once in a decade" optical phenomenon occurred. This is a direct quote from Chris Brightwell
"By my count, there are two sun dogs, a 22o halo, a parahelic circle, an upper tangent arc, and a parry arc"
So what exactly is all this arcs, halos, and circles?? Simply put, it is a ring around the sun. It is all dependent on what exactly is floating around in the upper levels of the atmosphere that is "bending" the light. It is all from ice crystals at the upper levels from storms, this time it was from Sandy.
Most of the time when you see a halo around the sun, or a sundog, or a, arc, the light enters a hexagonal column on one face, then comes out of another face. The difference between the entrance point and the exit point is 22 degrees. Thus you would see this halo as 22 degrees from the sun in a large circle. In a 46 degree halo the sun comes in through a face and out of the base of the column. This results in a much larger angle and it is much more rare.
Although it is does not happen as often as sun halos, you can also get halos around the moon. The image at the top of the page is every known phenomenon that can be seen when it comes to halos! Pretty cool!!